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handshake-regression

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The handshake-regression tag covers a specific security and interoperability regression in PowerShell Direct (PSDirect) on Hyper-V, addressed by Microsoft's KB5066360 hotpatch. This no-restart update fixes broken handshake sequences between unevenly patched host and guest virtual machines, raising the OS build to 26100.6569 on eligible SKUs. Discussions focus on the technical details of the regression, the hotpatch deployment process, and the importance of maintaining consistent patch levels across Hyper-V environments to avoid connectivity failures.
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    KB5066360: No-Restart PSDirect Hotpatch Fix for Hyper-V Handshake

    Microsoft has released KB5066360, a targeted hotpatch for Windows PowerShell that corrects an interoperability and security regression affecting PowerShell Direct (PSDirect) when host and guest virtual machines are unevenly patched; the update is a no-restart hotpatch for eligible systems and...
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    • build-26100-6569 cmdb cve mapping deployment enterprise security event 4625 event id extended security updates guest-parity handshake-regression host-parity host-to-guest hotpatching hyper-v inventory kb5066360 logging microsoft os build 26100.4946 patch management powershell psdirect restart secure boot security remediation ssu virtualization vulnerability windows windows 11 ltsc 2024 windows server 2025 windows update
    • Replies: 1
    • Forum: Windows News
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